JeopardyMendel Vocabulary Mendelian

Genetics Problems

Extensions to Mendel problems

Pedigrees

20 20 20 20 20

40 40 40 40 40

60 60 60 60 60

80 80 80 80 80

100 100 100 100 100

What country was Mendel from & What was his occupation?

Austria, Augustinian monk

What type of organisms did Mendel experiment on? How

many traits did he look at?Pea plants, 7

What did Mendel name his (a) parents, (b) children, and (c)

grandchildren?

a) P b) F1 c) F2

What was the difference between Mendel’s first and second set of

experiments?1st experiment he only observed 1 trait. 2nd experiment he observed

2 traits.

Describe Mendel’s experimental protocol.Cross fertilized truebreds

exhibiting opposite traits to produce an F1 generation. Then, allowed F1 hybrids to self-fertilize

to produce an F2 generation.

What is the difference between heterozygous & homozygous?

Hetero: 2 different alleles (Hh)Homozygous: Same alleles (HH or hh)

What is the difference between a gene & allele?

A gene is a segment of alleles that codes for a particular trait. An allele is the option within that gene. 2 alleles are inherited for

every trait, 1 from mom and 1 from dad.

What is the difference between phenotype and genotype?

Phenotype: Expressed trait (physical appearance)

Genotype: Combination of alleles that specifies a particular trait (Gg)

What does polygenic mean?

2 or more genes code for a particular trait

What is pleiotropy?

1 genes codes (affects) many traits. i.e. sickle cell anemia

What percentage of the offspring would you expect to be tall if you crossed a homozygous tall plant

with a short plant? (Tall is dominant)

100% tall

What percentage of the offspring would you expect to be tall if you crossed a heterozygous tall plant with a heterozygous tall plant?

(Tall is dominant)

75% tall

If the chance of having a boy is 50% (or ½), what is the chance of

having 2 boys?

½ X ½ = ¼ (25%) chance

What percentage of the offspring would you expect to be tall &

yellow if you crossed a pure tall and pure yellow plant with a short

and green plant? (Tall is dominant; yellow is

dominant)

100% tall and yellow

What percentage of the offspring would you expect to be tall &

yellow if you crossed a Heterozygous tall and yellow plant with a short and green

plant? (Tall is dominant; yellow is

dominant)25% tall and yellow

Hair texture in humans shows incomplete dominance. The H allele is for curly, and h is for

straight. An Hh person has wavy hair. What percentage of the offspring would you expect to

have wavy hair if you crossed a Wavy haired female with a

Straight haired male?

50% Hh (wavy hair)

Name 3 polygenic traits in humans.Eye color

HeightSkin color

Colorblindness is x-linked recessive. Cross a color-blind

male with a female carrier. What are the chances that a son will be

colorblind?

50% boys will be colorblind

Can a person with AB blood and a person with O blood have a child

with type O blood?

No! AB x O= 50% heterozygous A and 50% heterozygou B

Can a person heterozygous for type A blood and a person

heterozygous for type B blood have 3 kids each with a different

type of blood?

What is a pedigree?

Chart showing traits passed through generations

How can you tell if the shading on a pedigree is for a dominant or

recessive trait?

Dominant never skips a generation

What is the genotype of II-3?(Use the letter A)

Aa

What is the genotype of II-4?(Use the letter A)

A?

Why is it difficult to create a pedigree for something like heart

disease or cancer?Remember, genetics is heavily

affected by environment. Especially for these two diseases, environmental factors affect the

risks of both.

Final Question:

State how sex is determined in:

HumansFruit Flies

Bees

Final Question:

State how sex is determined in:

Humans – xx female / xy male

Fruit Flies – xx female / xy male

Bees – 32 female / 16 male